Search found 7284 matches

by Zamfir
Fri Jun 30, 2017 2:55 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

Tell me something: do you really think the Republican Congress will be able to pass Health Care reform, Tax Reform, and a Budget by years end? I obviously don't follow this in detail, but I got the impression that the Republicans were now negotiating the last votes in a health care bill that undoes...
by Zamfir
Fri Jun 30, 2017 2:14 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

@trmb6, the democrats won't get far by hoping for crumbs from a republican government, hoping that Trump will give them anything. If they want their policies enacted, they have to win elections. In the shorter term, they have to be popular enough that some republican politicians are hesitant to supp...
by Zamfir
Fri Jun 30, 2017 4:43 am UTC
Forum: Science
Topic: Hydrodynamic Levitation
Replies: 35
Views: 5024

Re: Hydrodynamic Levitation

Yes. Maybe you can clear it up. What physical principle says that the rays must balance the forces. Regarding the vertical direction only: keep in mind that the water jet from the hose is moving against gravity. The water slows down as it gets higher, until it falls down again. So at lower height, ...
by Zamfir
Thu Jun 29, 2017 7:18 pm UTC
Forum: Science
Topic: Hydrodynamic Levitation
Replies: 35
Views: 5024

Re: Hydrodynamic Levitation

https://preview.ibb.co/ninJa5/IMG_20170629_203446.jpg I thought a picture might help. There are three (groups of) forces acting on the ball. 1.the weight, downwards from its centre of gravity. 2. The absorption of momentum where the water hits the ball, resulting in an upwards force at a point offs...
by Zamfir
Thu Jun 29, 2017 12:28 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

@ j_s: what would be the advantage, compared to the same universal system on a higher level? There are obviously downsizes to such a low-level approach. Many municipalities are too small to cover the full range of healthcare, especially a large hospital with advanced specialisations. Even larger mun...
by Zamfir
Mon Jun 26, 2017 9:58 am UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

K-R, I can't figure you out if you want to make a semantic point, or a wider political point. You propose a fairly strict scope for the word "insurance". You want to exclude schemes that cannot for test for pre-existing conditions. Do you only object to using the word for schemes that fall...
by Zamfir
Fri Jun 16, 2017 7:12 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

Under Siege was good, but he never really matched that, did he?

-- ANd ninjaed already
by Zamfir
Fri Jun 16, 2017 2:32 pm UTC
Forum: News & Articles
Topic: The Darker Side of the News
Replies: 3973
Views: 508566

Re: The Darker Side of the News

Those [rich] people were safe. But they paid for it to get it. It would never occur to the authorities that if you are going to put people in high rises you should make them as safe as those people, not as safe as you think you can afford. Yes they definitely need better standards of safety, but ho...
by Zamfir
Tue Jun 13, 2017 2:19 pm UTC
Forum: Science
Topic: Telescope amplification with laser medium?
Replies: 18
Views: 3802

Re: Telescope amplification with laser medium?

Naively, I question the point. What new information does this get you? If optical amplification introduces less noise than electronic amplification, then it makes sense to amplify the light before you let it hit a sensor. The combined system would have a higher sensitivity (it could measure smaller...
by Zamfir
Mon Jun 12, 2017 9:39 am UTC
Forum: Science
Topic: Telescope amplification with laser medium?
Replies: 18
Views: 3802

Re: Telescope amplification with laser medium?

There are "optical amplifiers" that are close to what you describe. Those take a laser beam in and generate an amplified beam through optical means only (similar to what you describe). They are used to extend the range of fibre optic channels. These replaced older repeaters that would use ...
by Zamfir
Fri Jun 02, 2017 4:38 am UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

The important part is material progress in the technological and economic shift to wind and solar. That part is actually happening. The leaders will eventually follow - late as usual. That's a bit unfair, I think. That progress in renewable energy doesn't fall from the sky, it's paid for by the enc...
by Zamfir
Thu Jun 01, 2017 7:17 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1798
Views: 284048

Re: The Thread To Remind Me We're Living In The Future

We are artificially limiting the AI's biggest advantages in an attempt to humanize them Don't think about it as limiting the agent, but adding an extra rule to the game. That creates a new game, let's call it action-limited StarCraft, or ALS. This is likely a more interesting game than ordinary Sta...
by Zamfir
Thu Jun 01, 2017 1:08 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1798
Views: 284048

Re: The Thread To Remind Me We're Living In The Future

Anyway, my point is that a game like StarCraft would not be "interesting" from an AI perspective. Still, researchers are interested in it. Not only in making a crazy fast micro-management miracle, but creating a machine that plays the game more or less as a human would. The attraction is ...
by Zamfir
Thu Jun 01, 2017 12:45 pm UTC
Forum: Science
Topic: Superconducting CPU?
Replies: 66
Views: 9774

Re: Superconducting CPU?

Another point of pedantry: Making an inefficient heater is much more difficult than making an efficient one. It's more that "heat_out/energy_in" is not a very good concept to evaluate the efficiency of heating. It makes a heat pump just as efficient as a resistor. Unless you restrict to el...
by Zamfir
Thu Jun 01, 2017 10:20 am UTC
Forum: Science
Topic: Superconducting CPU?
Replies: 66
Views: 9774

Re: Superconducting CPU?

Vanishingly little , though. Like, it appears that 2-3 watts of sound is equivalent to a lawn mower engine. Ah, that's 2-3 watts of electric speaker power, but only on the order of 0.01W of sound power... Regular speakers are not very efficient. 1 watt of sound power is more like a police car siren.
by Zamfir
Tue May 23, 2017 7:07 pm UTC
Forum: Science
Topic: Uses of 1:11 Million Gear Ratio
Replies: 15
Views: 3720

Re: Uses of 1:11 Million Gear Ratio

A telescope comes to mind. If you want to keep a telescope pointed at a fixed point relative to the stars, it has to rotate with a speed of 1/day, or 1/1440 minutes. At a gearing ratio of 11 million, you get a drive speed of 7000 rpm. That's in the ballpark for a small electric motor. I don't know i...
by Zamfir
Mon May 22, 2017 1:16 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

I have to say, the 242nd season of The United States is definitely the best so far. I hope they'll renew the show for another season, though it's hard to see where they can go from here, plot wise. Let's hope it doesn't end in a big cliffhanger. What's not to like? Donald Trump is hanging from a cl...
by Zamfir
Fri May 19, 2017 2:33 pm UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 14720
Views: 2245925

Re: In other news... (humorous news items)

That kind of imagination lies at the root of every IT project disaster. "System A already has data X, system B generates data Y that is a lot like X. How hard can it be to connect them together?"
by Zamfir
Wed May 17, 2017 8:59 am UTC
Forum: News & Articles
Topic: NHS cyberattack
Replies: 82
Views: 16577

Re: NHS cyberattack

I wonder why the NSA is so good at making these weapons but the Pentagon is so terrible at their weapons programs. Maybe it's the scale? The pentagon isn't bad at weapons programs - in any category, they have the best weapons or something close to it. In some categories ,they have the only weapons....
by Zamfir
Mon May 15, 2017 1:35 pm UTC
Forum: News & Articles
Topic: NHS cyberattack
Replies: 82
Views: 16577

Re: NHS cyberattack

Yeah, those are rather common actually. Only at detection strength though, not the flesh-burning kind.
by Zamfir
Mon May 15, 2017 1:15 pm UTC
Forum: News & Articles
Topic: NHS cyberattack
Replies: 82
Views: 16577

Re: NHS cyberattack

I work in industrial gas cleaning, which is a bit like HVAC except the ducts are big enough to march armies through. They do have the typical intrusion protection mechanisms from the movies. The big moving fan, the burners, the long vertical stretch, the crusher, the submerged section that ends in a...
by Zamfir
Mon May 15, 2017 9:21 am UTC
Forum: News & Articles
Topic: NHS cyberattack
Replies: 82
Views: 16577

Re: NHS cyberattack

Windows XP is a real stumbling block for a lot of people. Because the original code was so fundamentally broken, there's no hope of ever providing real security over that system. The other half of the story is that XP (and PC hardware) reached a "good enough" plateau. In the 90s, people a...
by Zamfir
Sat May 13, 2017 5:53 pm UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 32303

Re: How would you change the U.S. tax system?

Today we're at least honest about it: there's nothing tying the money down.
I am not sure what this means. Of course there's something thing the money down - for every dollar worth of deposits, bank have more than one dollar of assets. It's just that most of those assets are not dollars
by Zamfir
Fri May 12, 2017 8:07 pm UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 32303

Re: How would you change the U.S. tax system?

Mastercard doesn't loan out money itself, or does it in the US?
by Zamfir
Fri May 12, 2017 5:28 pm UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 32303

Re: How would you change the U.S. tax system?

OK it's allowed
by Zamfir
Fri May 12, 2017 5:25 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

These were the conditions that created the "Bay of Pigs" disaster. Tons of smart people were in the same room when the decision went down, but no one was willing to consider alternative viewpoints. I fear something along those lines will happen before Trump loses credibility If I were the...
by Zamfir
Fri May 12, 2017 2:31 pm UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 32303

Re: How would you change the U.S. tax system?

@philip, if you want I can organise that for you. You don't pay me taxes, and in return I promise not to raise an army or hand out corporate subsidies. In fact, I set that up already last year.
by Zamfir
Mon May 08, 2017 8:02 pm UTC
Forum: General
Topic: Let's Talk Money
Replies: 222
Views: 50669

Re: Let's Talk Money

You didn't discuss the cases where you have time to spare but no money. Can you think of reasons why you would spend money instead of sweat equity there? Sure, there's plenty of situations where people do stuff themselves to save money, or for whatever other reason. They don't need me to tell them ...
by Zamfir
Mon May 08, 2017 1:20 pm UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 14720
Views: 2245925

Re: In other news... (humorous news items)

Result? Macron in a landslide . 65% counts as a landslide I guess. Much less of a landslide than in 2002 (82% vs 18%). Hoping this is the high point of the FN and not the direction politics in France are going to continue. I don't know why people keep bringing this comparison up; FN has gone way wa...
by Zamfir
Mon May 08, 2017 10:47 am UTC
Forum: General
Topic: Let's Talk Money
Replies: 222
Views: 50669

Re: Let's Talk Money

I like to buy raw materials as cheap as possible and make things as high quality as possible to save money, like my own bee breeding equipment, my own shoes and a greenhouse, the savings have been very high indeed. Good old fashion sweat equity. It's a shame that not everyone does it, I know I cert...
by Zamfir
Mon Apr 24, 2017 7:44 pm UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 14720
Views: 2245925

Re: In other news... (humorous news items)

What does happen if one of the candidates gets assassinated? Does the other win by default? Does the 2nd runner up get the slot? Does the candidate's party get to nominate someone? Does the 2nd round get postponed? Does the first round get redone? The assassin absorbs the powers of the dead candida...
by Zamfir
Mon Apr 24, 2017 12:52 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1798
Views: 284048

Re: The Thread To Remind Me We're Living In The Future

How often does the electric airplane has to recharge if it is used as taxi, and how long does that take? Should work the same as for an electric car, or phones, etc. If the charger is large enough, and the battery chosen well, you can get to 70% in half an hour or so, somewhat less if you're willin...
by Zamfir
Mon Apr 24, 2017 10:59 am UTC
Forum: Science
Topic: Lay question about entropy
Replies: 29
Views: 5249

Re: Lay question about entropy

But the statistics of reversible physics can only be irreversible in peculiar circumstances. In the overwhelming majority of circumstances, they will be symmetrical. So that does not answer the question of why our particular circumstance is so extremely peculiar. Is 'majority of circumstances' real...
by Zamfir
Sun Apr 23, 2017 6:37 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 6172
Views: 461004

Re: Trump presidency

Is it a white supremacist message? The guy sells books on his website. " The color of crime" , "The passing of the great race" , "The Conquest of a Continent" , "Victory Or Violence - The Story Of The Awb Of South Africa", "The rising tide of color again...
by Zamfir
Sat Apr 22, 2017 6:21 am UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1798
Views: 284048

Re: The Thread To Remind Me We're Living In The Future

I don't think these concepts are intended (or suitable) as drop-in replacements for a family car, more as a taxi service. Think of the essential taxi trip - from the main airport to the centre and back. Just that kind of trip alone is already a sizable market. There are various of these projects aro...
by Zamfir
Tue Apr 18, 2017 6:27 am UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 57
Views: 11368

Re: Storing Nuclear Waste on the Moon

Sure, if you cut safety margins down to the standards of spaceflight, it becomes cheaper. But why bother then? Underground storage is very affordable without such compromises. An alternative scheme should meet higher standards to be worth considering, not lower. Edit: a technicality. Burn-up for nuc...
by Zamfir
Thu Apr 13, 2017 1:59 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 613
Views: 80187

Re: Science-based what-if questions

No way, is that really true? Yes, and that's for ordinary silver-and-copper alloys. Apparently, there is even an alloy with 99% gold and 1% titanium that can be cold worked and annealed to reach 660MPa yield strength and 800 MPa ultimate strength. That's beyond ordinary construction steel. @morris,...
by Zamfir
Thu Apr 13, 2017 10:58 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 613
Views: 80187

Re: Science-based what-if questions

Yeah, but that's just trace amounts. The interesting stuff are radiation -shielding windows, those are mostly heavy metal by weight. Lead or barium, typically. I just don't know if that would work with gold.
by Zamfir
Thu Apr 13, 2017 10:29 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 613
Views: 80187

Re: Science-based what-if questions

Very pure gold is relatively weak, as most pure metals are. But typical jewelry gold of 22kt (90% pure) is easily as strong as standard construction steel, and steel is already overly strong for the construction of regular houses. At first approximation, we can assume that all metal structures can b...
by Zamfir
Thu Apr 13, 2017 5:40 am UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 57
Views: 11368

Re: Storing Nuclear Waste on the Moon

I tried to put some numbers on this. Starting point is this: http://www.neimagazine.com/features/featuredeveloping-a-spent-fuel-cask-for-air-transport-4210559 . It's a container to transport spent fuel by plane, designed to survive falls from high altitude. Add heat shielding to survive uncontrolled...

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